With a solid birch wood cover and walnut finish accents, the Heath/Zenith SL-6510 Wireless Door Chime with Modern Accents offers genuine bell sound and a wireless design for easy installation. If you need a doorbell but are a little nervous about doing your own wiring, then wireless is the way to go. With Heath/Zenith's wireless doorbell systems, all you need to do is mount the doorbell and the chime; no electrical installation is needed. The Chime features an attractive birch cover, and you can also select from 128 code settings (which allow the doorbell to communicate with the chime) to make sure your neighbor's wireless systems don't set of your chime. Mounting hardware is included as well as batteries for the Push Button but four "C" Batteries are required for the Chime.